The SFT-1 SUPERFLOW™ has the best domestic hot water performance in hard water locations. Hard water causes limescale buildup in all types of water heaters resulting in decreased efficiency and performance.
When tested against leading Tankless competitors*, SUPERFLOW™ had the least amount of limescale buildup and maintained like new performance between routine maintenance. This extraordinary hard water performance is due to our patented heat exchanger design with integrated copper coil.
*Tested with a water hardness of up to 400ppm (23gpg).